BQ27Z746: Dividing an authentication key into two sub key burning packages

H qing

Part Number: BQ27Z746
Other Parts Discussed in Thread: BQKEYPACKAGER, BQKEYPROGRAMMER

For safety reasons, we need to divide the authentication key of the bq27z746 chip into two sub keys package (. bqk package).

then hand them over to the battery manufacturer and product assembly manufacturer to burn separately onto the bq27z746.

How to use bqKey Packager to create such two key package.

+1 Links 3 个月前

Hello,

You can split the key by manually editing the flash stream file that is generated by using the BQKEY toolchain. For example:

The tool chain will give you this fs file when you use the BQKEYPACKAGER and BQKEYPROGRAMMER toolsbq27z746_SHA2_Test1.gm.fs

You can then manually edit the document to split the key into two parts and make the following two files: bq27zXXX_SHA2_Test1_KeyF.gm.fs bq27zXXX_SHA2_Test1_KeyC.gm.fs

NOTE: this is just an example for how you can do this.

Regards,

Links.

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